A second emphasis of environmental sociology is environmental inequality and the related concept of environmental racism. Environmental inequality (also called environmental injustice) refers to the fact that low-income people and people of color are disproportionately likely to experience various environmental problems, while environmental racism refers just to the greater likelihood of people of color to experience these problems (Walker, 2012). [7] The term environmental justice refers to scholarship on environmental inequality and racism and to public policy efforts and activism aimed at reducing these forms of inequality and racism. The box discusses some very significant scholarship on environmental racism.